Blowpipe



G. H. ZOUCK.

BLOWPIPE.

APPLICATION FILED MAR. 1, 1919.

Patented July 15, 1919.

INVENTOR B ATTORNEYJ To all whom it may concern:

FIQ.

GEORGE H. ZOUGK, 0! ORANGE, NEW JERSEY, ASSIGNOR TO AIR REDUCTION COMPANY,

. INC., A. CORPORATION OF YORK.

BLOWPIPE.

Specification of Letters Patent. P t t d July 15, 1919,

1 Application filed March 1', 1919,. Serial No. 279,969.

Be it known that I, GEORGE H. ZoUcK, a citizen of the United States, residing at Orange, in the coLm-ty of Essex, State of New Jersey, have invented certain new and useful Improvements in Blowpipes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to blowpipes and presents, among other advantageous features, a simple and relatively inexpensive structure wherein the proportioning of the gaseous mixture is controlled by a removi ble tip, which, when assembled with the head, provides a gas tight joint preventing improper escape of the gases. p

A further object of my invention is the provision in a blowpipe having the above enumerated advantages of means for assuring an intimate mixture of the combustible and combustion supporting gases.

Further objects and advantages of my invention will be apparent as it is better understood by reference to the following specification when read in connection with the accompanying drawing illustrating the preferred embodiment thereof in which,

Figure 1 is a longitudinal section through the head and tip of a blowpipe constructed in accordance with my invention;

Fig. 2 is a section on the line 2-2 of Fig. 1; and

Fig. 3 is a rear end elevation of the tip.

Numerous forms of blowpi'pes have been heretofore suggested or constructed, some of which are relatively efiioient while others are totally unadapted to the. accomplishment of their desired objects. Among the desired features of a lblowpipe may be mentioned, eflective sealing between the tip and head to prevent escape of the gases, control of the proportion-ing by the tip so that by a simple removal and replacement a proper proportioning of thegases in the tips intended to provide flames of different sizes is assured,

and proper mixture of the combustible and oxidizing gases before thelatter are discharged from the tip. So far as applicant is aware, none of the commercially available blowpipes embody all of the above enumerated advantages and each blowp-ipe falls somewhat short of providing the highest efficiency in a structure of this character. I have discovered that sealing of the gases, control of the mixture and perfect mixing may be accomplished through the combination of structural features hereafter described and that such a blowpipe may, moreover, be constructed at a relatively low cost to meet the increasing demand for an efficient blowpipe. In the drawing I have illustrated the best mode of carrying my inventlon into practice, but it is to be understood that many of the details of construction may varied so long as the essentials as hereinbefore enumerated are embodied in the structure.

Referring to the drawing, 5 indicates a head having oxidizing and combustible gas passages 6 and 7, the gases being delivered to the passages by pipes 8 and 9 in accordance with the usual practice in blowpipe construction. The head is provided with a seat 10, preferably conrical in form and pr ectlng into a surrounding cavity bounded by the wall 11 of the head. The passage 6 preferably extends to the apex of the cone and a bushing 12 having a passage 13 of somewhat smaller cross sectional area than the passage 6 is threadedly mounted in the end of the passage 6 and projects somewhat beyond the apex of the cone. The bushing 12 may, however, be omit-ted andga projecting nozzle may be formed integrally with the head 5, the passage 6 extending through the nozzle.

A tip 14 having a discharge passage 15 is provided at its rearward end with a face conforming to and cooperating with the seat 10 to form a gas tight joint therewith when the tip is held in assembled relation with the head by the nut 16. At its inner end, the tip 14 is provided with a recess 17 communicating with the discharge passage 15 and into which the bushing or nozzle 12 projects. The recessiI'Z' provides a mixing chamber wherein the combustible and oxidizing gases are thoroughly commingled before they enter the discharge passage 15 which is arsage 6. The combustible gas is delivered from the passage 7 to the channel 18. One or more grooves or depressions 19 are provided in the surface of the tip which coop erates'with the seat 10 and these grooves or depressions convey the combustible gas from the channel 18 to the recess 17. The grooves or depressions 19 are carefully regulated as to cross sectional area so that the exact pro portion of combustible gas required to produce a proper mixture with the oxidizing gas issuing from the passage 6 is delivered to the recess 17. In tips designed to produce flames of different sizes, the number and relative size of the grooves 19 are varied and by simply substituting a tip adapted to produce a flame of the desired character, proper proportioning of the mixture is assured.

From the foregoing it will be readily appreciated that I have effected a blowpipe structure embodying all of the desirable features which lend themselves to eiiicient operation thereof. A gas tight joint is provided between the seat 10 and the cooperating surface of the tip and this joint surrounds the gas passages in such a manner that none of the gas can escape otherwise than through the discharge passage of the tip. Exact proportioning of the gases is provided through the grooves, removable and replaceable with the tip andthorough mixing is accomplished by delivering the gases to the recess at the rear of the tip before the gases are permitted to enter the discharge passage. The combustible gas-delivered to the recess 17 is drawn into. and thoroughly incorporated with the stream of gas issuing from the bushing or nozzle 12 and as a resultcomplete' combustion with the highest thermal efliciency is assured.

As previously noted various changes may be made in the form, arrangement and construction of the ,parts without departing from the invention or sacrificing any of its material advantages...

I claim 1. In a blowpipe, the combination with a head having a seat and'oxidizing and combustible gas passages, of a tip having a surface cooperating with said seat to form a gas tight joint surrounding the ends of said passages, a discharge passage disposed in alinement with one of the passages in said head, a recess communicating with said discharge passage and a groove or depression in said surface connecting the other passage in said head to said recess.

2.. In a blowpipe, the combination with a head having a projecting conical seat'and oxidizing and combustible gas passages, of a tip having a surface cooperating with said seat to form a gas tight joint, surrounding the ends of said passages, a discharge passage disposed in alinement with one of the passages in said head, a recess communicating with said discharge passage and a groove or depression in said surface for conveying gas from the other passage in said head to said recess.

3. In a blowpipe, the combination with a head having a seat, oxidizing and combustible gas passages and a projecting nozzle, in which one of said passages terminates, of a tip having a surface cooperatingwith said seat to form a gas tight joint surrounding the ends of said passages, a discharge passage, a recess communicating with said discharge passage and into which said nozzle projects and a groove ordepression in said surface whereby gas from the other passage in said head is delivered to said recess.

4. In a blowpipe, the combination with a head having a projecting conical seat, oxidizing and combustible gas passages and a nozzle at the apex of said seat in which one of said passages terminates, of a tip having a surface cooperating with said seat to form a gas tight joint surrounding the ends of said passages, a discharge passage, a recess communicating with said discharge passage and into which said nozzle projects and a groove or depression in said surface whereby gas from the other passage in said head is delivered to said recess.

5. In a blowpipe the combination with a head having a seat and oxidizing a-nd combustible gas pas-sages, of a tip having a surface cooperating with said seat to form a gastight joint surrounding the ends of said passages, a discharge passage and a recess communicating with said discharge passage and with one of the passages in said head and a plurality of grooves or depressions in said surface connecting said recess with the other passages in said head.

6. In a blowpipe, the combination with a head having a conical seat, oxidizing and combustible gas passages, and a nozzle at the apexIof said seat forming the outlet from one of said passages, of a tip having a surface cooperating with said seat to form a gas tight joint surrounding the ends of said passages, a recess to receive said nozzle, and grooves or depressions connecting the other passage in said head to said recess- In testimony whereof I afiix my signature.

1 GEORGE H. ZOUCK- 

